CHAPTER XIX 



ENTOZOA (WORMS) 



Hounds are no exception to the rule when it comes 

 to the invasion of the ahmentary canal by worms, 

 which are divisible into two principal classes, i.e., 

 Ncematodes or round-worms, and Cestodes or tape- 

 worms, both of which are exceedingly common, in- 

 habiting either the stomach or the intestines, or 

 both. There is an uncommon form of parasite 

 which takes up its abode in the wall of the stomach — 

 being a true blood-sucking parasite. This is called 

 Spiroptera sanguinonata, and it is a rare cause of 

 haemorrhage from the stomach. A fluke-shaped 

 worm occasionally invades the nasal passage or 

 sinuses in connection therewith. (See " Catarrh in 

 Respiratory Diseases.") In some foreign countries 

 a thread-worm takes up its habitat in the chambers 

 of the heart ; it is spoken of as the cruel thread- worm 

 or Filaria immitis. The commonest round-worm 

 is Ascaris marginatay also referred to under the head- 

 ing of "Gastric Catarrh and Inflammation of the 

 Bowels" (which see). The commonest tape-worm 

 is Tania cucumerina, and the larval or dormant 



phases of this tape-worm takes up its abode in the 



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